test/Tizen.NUI.Devel.Tests.Ubuntu/nunit.framework/Constraints/ComparisonAdapter.cs

   1 // ***********************************************************************
   2 // Copyright (c) 2009 Charlie Poole
   3 //
   4 // Permission is hereby granted, free of charge, to any person obtaining
   5 // a copy of this software and associated documentation files (the
   6 // "Software"), to deal in the Software without restriction, including
   7 // without limitation the rights to use, copy, modify, merge, publish,
   8 // distribute, sublicense, and/or sell copies of the Software, and to
   9 // permit persons to whom the Software is furnished to do so, subject to
  10 // the following conditions:
  11 //
  12 // The above copyright notice and this permission notice shall be
  13 // included in all copies or substantial portions of the Software.
  14 //
  15 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  16 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  17 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  18 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  19 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  20 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  21 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  22 // ***********************************************************************
  23 #define PORTABLE
  24 #define TIZEN
  25 #define NUNIT_FRAMEWORK
  26 #define NUNITLITE
  27 #define NET_4_5
  28 #define PARALLEL
  29 using System;
  30 using System.Collections;
  31 using System.Collections.Generic;
  32 using System.Reflection;
  33 using NUnit.Compatibility;
  34
  35 namespace NUnit.Framework.Constraints
  36 {
  37     /// <summary>
  38     /// ComparisonAdapter class centralizes all comparisons of
  39     /// _values in NUnit, adapting to the use of any provided
  40     /// <see cref="IComparer"/>, <see cref="IComparer{T}"/>
  41     /// or <see cref="Comparison{T}"/>.
  42     /// </summary>
  43     public abstract class ComparisonAdapter
  44     {
  45         /// <summary>
  46         /// Gets the default ComparisonAdapter, which wraps an
  47         /// NUnitComparer object.
  48         /// </summary>
  49         public static ComparisonAdapter Default
  50         {
  51             get { return new DefaultComparisonAdapter(); }
  52         }
  53
  54         /// <summary>
  55         /// Returns a ComparisonAdapter that wraps an <see cref="IComparer"/>
  56         /// </summary>
  57         public static ComparisonAdapter For(IComparer comparer)
  58         {
  59             return new ComparerAdapter(comparer);
  60         }
  61
  62         /// <summary>
  63         /// Returns a ComparisonAdapter that wraps an <see cref="IComparer{T}"/>
  64         /// </summary>
  65         public static ComparisonAdapter For<T>(IComparer<T> comparer)
  66         {
  67             return new ComparerAdapter<T>(comparer);
  68         }
  69
  70         /// <summary>
  71         /// Returns a ComparisonAdapter that wraps a <see cref="Comparison{T}"/>
  72         /// </summary>
  73         public static ComparisonAdapter For<T>(Comparison<T> comparer)
  74         {
  75             return new ComparisonAdapterForComparison<T>(comparer);
  76         }
  77
  78         /// <summary>
  79         /// Compares two objects
  80         /// </summary>
  81         public abstract int Compare(object expected, object actual);
  82
  83         class DefaultComparisonAdapter : ComparerAdapter
  84         {
  85             /// <summary>
  86             /// Construct a default ComparisonAdapter
  87             /// </summary>
  88             public DefaultComparisonAdapter() : base( NUnitComparer.Default ) { }
  89         }
  90
  91         class ComparerAdapter : ComparisonAdapter
  92         {
  93             private readonly IComparer comparer;
  94
  95             /// <summary>
  96             /// Construct a ComparisonAdapter for an <see cref="IComparer"/>
  97             /// </summary>
  98             public ComparerAdapter(IComparer comparer)
  99             {
 100                 this.comparer = comparer;
 101             }
 102
 103             /// <summary>
 104             /// Compares two objects
 105             /// </summary>
 106             /// <param name="expected"></param>
 107             /// <param name="actual"></param>
 108             /// <returns></returns>
 109             public override int Compare(object expected, object actual)
 110             {
 111                 return comparer.Compare(expected, actual);
 112             }
 113         }
 114
 115         /// <summary>
 116         /// ComparerAdapter extends <see cref="ComparisonAdapter"/> and
 117         /// allows use of an <see cref="IComparer{T}"/> or <see cref="Comparison{T}"/>
 118         /// to actually perform the comparison.
 119         /// </summary>
 120         class ComparerAdapter<T> : ComparisonAdapter
 121         {
 122             private readonly IComparer<T> comparer;
 123
 124             /// <summary>
 125             /// Construct a ComparisonAdapter for an <see cref="IComparer{T}"/>
 126             /// </summary>
 127             public ComparerAdapter(IComparer<T> comparer)
 128             {
 129                 this.comparer = comparer;
 130             }
 131
 132             /// <summary>
 133             /// Compare a Type T to an object
 134             /// </summary>
 135             public override int Compare(object expected, object actual)
 136             {
 137                 if (!typeof(T).GetTypeInfo().IsAssignableFrom(expected.GetType().GetTypeInfo()))
 138                     throw new ArgumentException("Cannot compare " + expected.ToString());
 139
 140                 if (!typeof(T).GetTypeInfo().IsAssignableFrom(actual.GetType().GetTypeInfo()))
 141                     throw new ArgumentException("Cannot compare to " + actual.ToString());
 142
 143                 return comparer.Compare((T)expected, (T)actual);
 144             }
 145         }
 146
 147         class ComparisonAdapterForComparison<T> : ComparisonAdapter
 148         {
 149             private readonly Comparison<T> comparison;
 150
 151             /// <summary>
 152             /// Construct a ComparisonAdapter for a <see cref="Comparison{T}"/>
 153             /// </summary>
 154             public ComparisonAdapterForComparison(Comparison<T> comparer)
 155             {
 156                 this.comparison = comparer;
 157             }
 158
 159             /// <summary>
 160             /// Compare a Type T to an object
 161             /// </summary>
 162             public override int Compare(object expected, object actual)
 163             {
 164                 if (!typeof(T).GetTypeInfo().IsAssignableFrom(expected.GetType().GetTypeInfo()))
 165                     throw new ArgumentException("Cannot compare " + expected.ToString());
 166
 167                 if (!typeof(T).GetTypeInfo().IsAssignableFrom(actual.GetType().GetTypeInfo()))
 168                     throw new ArgumentException("Cannot compare to " + actual.ToString());
 169
 170                 return comparison.Invoke((T)expected, (T)actual);
 171             }
 172         }
 173     }
 174 }